APA引文

Sasikumar Purameri. (2014). Stephen Hawking. Progress Publication.

Chicago Edition Citation

Sasikumar Purameri. Stephen Hawking. Kozhikode: Progress Publication, 2014.

MLA引文

Sasikumar Purameri. Stephen Hawking. Progress Publication, 2014.

警告：这些引文格式不一定是100％准确.